Portable computer



FIG. 1 is a top plan view of a portable computer showing our new design, the computer being in the closed position.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a left side elevational view thereof, the right side being a mirror image.

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a portable computer, substantially as shown and described. 